Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008lnea....3..201v&link_type=abstract
Lecture Notes and Essays in Astrophysics, vol. 3. Proceedings of the 3rd Symposium of the Astrophysics Group of the Spanish Roya
Astronomy and Astrophysics
Astrophysics
Ices, Infrared Spectroscopy, Laboratory Experiments, Insterstellar Medium, Solar System
Scientific paper
Part of our knowledge about interstellar, planetary and cometary ices derives from the identification of bands in astronomical spectra of distant objects, rather than from direct measurement. Therefore, laboratory experiments on simple ices and its mixtures carried out under physical conditions as close as possible to the astrophysical environments are essential for the identification of ices present in space. In this work, we first give the reader an introduction to the infrared properties of the ices present in the Universe, defining the term ice and showing the importance of infrared spectroscopy for the study of ices, the locations in space where ices are mainly found along with the ices detected so far, and some of the experimental laboratories around the world working on ice studies. The second part of this work is focused on the Experimental Astrophysics Laboratory we have set up in order to characterize in the mid and far infrared range (MIR and FIR respectively), which covers the 2.5-1000 μm region, ices of astrophysical interest. One of the key components of the laboratory is a Si composite bolometer cooled by liquid He used to obtain spectra with a sensitivity much greater than that obtained with a standard DTGS detector working at room temperature in the FIR where bands of small intensity lie. The MIR and FIR spectra we shall obtain in the future will serve to characterize in those spectral ranges some simple ices and their mixtures and also to compare data mainly coming from the forthcoming Herschel satellite with laboratory data. It is also planned to do a systematic laboratory study of the effects that ultraviolet (UV) photolysis and temperature have on the ice band profiles and on the ice structure.
Cantó Jorge
Domingo Miguel
Gomis Oscar
Luna R.
Millan C.
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